# include <bits/stdc++.h>
const int dx[5] = {0, 2, 2, 1, 1};
const int dy[5] = {0, 1, -1, 2, -2};
struct Map { 
    int x, y;
};
int i, j, n, m, k;
Map a[51];
int main() { 
    cin >> n >> m;
    fillchar(a);//结构体不能直接memset
}
